Going for multi-monitor?
Multi-4K?

U2312HM has DVI, VGA & DP but no HDMI, if you're sure won't be using HDMI then can go ahead, DVI is way to go for Full HD and beyond, VGA is seriously outdated unless otherwise no other choice.

You mean S22A100 vs U2312HM in terms of graphics quality?
It's the normal comparison of TN vs IPS, day and night different, obvious win for U2312HM.

Usually dead pixels means the panel itself is required to be changed. If it's an old monitor (out of warranty) then just change a new one, repair cost is just about the same as your whole monitor price (old one after all).
New monitor has 3-year warranty by default.

Looking for similar brand and performance? Then try the U2413H(M??), around RM900.

Ah the U2414H kills it, 24" suppose to have 1200p, now they move to 16:9 which kills the reason to have 24" monitor (1200p).

27" has been around for few years, they're in the mid-entry for someone whom can't afford the 30".
As for movie only, any 23" should fit the bill, 23" being the value compare to 24".
If you have choice you may look into 21.5" as well, some of them carry Full HD, for a very small desk.

http://www.tftcentral.co.uk/reviews/dell_p2414h.htm

TFTCentral provide many Dell U series review, do check them out time to time.
They review mostly mid to higher tier monitor.

Google? First link got this: http://www.acer.com.my/ac/en/MY/content/pr...et/UM.QV6SS.002
It's IPS but no review or good source of its performance and calibration result.

Dell U2713H or U2713HM should suits your needs, those are cheaper and locally available models, if you can afford more, you can seek those much higher grade professionals monitor with uniformity adjustable monitor, those are really expensive and needs to import.
With that said, every professional monitors will not be accurate out of box unless it's tuned using professional calibration tools, despite that each manufacturer has its own calibration tools, methods so if you really want archive accurate colours, it's best to seek for professional calibration every month or buy yourself calibration tools.

U2414H has very good panel, class 1 (according to TFTCentral) response time so FPS gaming is not an issue here.
But the input ports is not for every whom still using VGA for my old machines (oldies, ahem...)
Will definitely looking forward their future panels, they're surely improved lots recently.

Try to contact Teng as suggested by some here, ask if the price is lower.

Well, my old C2D board still using VGA only output...
My gaming rig and laptop has HDMI which I'm not really concern but... my KVM is also still VGA...
It'll be sure a long time before I change all to DVI or HDMI capable...

Regards calibration tools, quite subjective, may have to look at majority and the colour space that you will be working on, if you don't mind little set-back, the entry Spyder should provides you basic calibration for starters.
I think someone here provides the calibration service, need to flip them through... I think it's last thread version, kinda lazy to dig them through, hopefully they see this post and give you informative feedback.

Are you limit your budget to these 2 models? If you're connecting MBP and XBox360 at the same time, the only option is S2440L, otherwise you may find yourself searching for converter to connects both your laptop and console.

If you're not then try push more for U2414H, which has 2x HDMI ports, suitable for your needs as you won't need to change cables.
U2414H I believe the promo already ended but some reseller may provide better price than Dell Direct. Search for user keyword "teng".

Btw, U2414H really has great review and value for its price, a definite improvement over last generation IPS.

Unless you dare to take the risk, there's nothing wrong with purchasing non-warranty products, its all about trust.

Resolution on Screen size V.S. Visible pixels distance.
It's to shows that how much distance to distinguish the pixels on a huge screen size and resolutions.
This also shows the benefits of buying a huge screens with high resolutions, such as the 4K.

Erm, most 20" still has such resolution but rarely can be found in the market due to the common demand for 1080p instead.
I found one on Dell.com.my, easy search, 20" (19.5")
http://www1.ap.dell.com/content/products/p...dhs1&l=en&s=dhs

Dell usually order online, unless you want to have a demo unit shown at shelf.

Ah, found 1 same taste as me, all the 27" is way over budget, and when they do have promo always not enough dough... >>" (chh....)
Been using Samsung 2333SW (1200p was over 1K last time) and been stuck with it till now, yellowish already since it's CCFL technology.
Not going to upgrade just bit, if want upgrade one shot 1440p (1600p for richie) or 4K (another few more years maybe?).
4K is not going common soon even with those branding rushing and advertising over it, it is just to let the world know of its existence, just like how the 1080p was first introduced into the market (Blu-ray makes the kick-start). Some more I'm still using VGA with some of my PC/laptop, and just recently bought KVM just for them.

1080p vs 1440p, huge difference, it's the pixel count and video size displayed on screen, for 1080p video will fit full screen nicely on 1080p 27" but on 1440p, borders on all side so you see those things much smaller than usual.
This also depends on how far your eye from the screen, 27" 1080p allows you to sit further without straining your eyes to look for the smaller details, 27" 1440p will be a little difficult, but workspace for this much pixels count is nice... IMO.

Youtube video, no, even Intel IGP has no problem doing so.

All about lucks I guess, if they still can give you the full warranty then you can take it (cross-finger), but if they don't probably they can give you a good price for it, since it's like a 2nd hand unit.